Pump



NOV. 15, 1955 1 E, RUSSELL 2,723,794

PUMP

Filed Sept. 7 1951 Cnvento" JL f4 OPKBH United States Patent() PUMP Linus E.4 Russell, Springfield, Oho, assignor to Peters & Russell; Inc.,.Springfield, hio,la corporation of Ohio Application September 7,1951, Serial No. 245,581

iClailnS.- (Cl-229x427).

This iriventicn relaresio hand, Qgejrad 'air pumps, and mere particularly te. the cylinder. Constantina and. assembly used therein,

Pumps ofthe instant tyre-.areufsedir many andsundry different applications. In all such applications, there is one common prerequisite, namely, economy and durability. Tomeet andsatisfy-thtbl demandit isnecessary that the pumps be o f such design that they may be economically manufactured; yet be durable and of long life.

Thus the object. of the inventiony is to improve. theconstruction. as well, aS themeans andmod'e of assembly. of handpumps, whereby they maynot only be economically and easily manufactured, but. will bev more efficient and satisfactoryA in use,` adaptable to a wide/variety of applications having relatively few .partstandfbe unlikely to get out offrepair,

tt is4 ai further object. of, the invention tot'prodpce a durable and inexpensive cylinder construction in pumps of the class described, using only fiberboard and stamped metal parts.

Another object of the invention is to-reduce materially the number of parts used in the cylinder assembly as well as the need for machining such parts.

A further object of the invention is to utilize a principle of exible metallic straps for seating end closures on the cylinder element and to provide a single simple adjustment means for drawing up such straps to thereby firmly seat the end elements on the cylinder.

A further object of the invention is to provide a pump structure possessing the advantageous structural features, the inherent meritorious characteristics and the mode of assembly herein mentioned.

With the above primary and other incidental objects in view as will more fully appear in the specification, the invention intended to be protected by Letters Patent consists of the features of construction, the parts and combinations thereof, and the mode of operation, as hereinafter described or illustrated in the accompanying drawings, or their equivalents.

Referring to the accompanying drawing, wherein is found the preferred but obviously not necessarily the only form of embodiment of the invention,

Fig. 1 is a perspective View of a hand'pump in accordance with an illustrative embodiment of the invention;

Fig. 2 is a fragmentary view in longitudinal section showing the manner of attachment of the upper end of the tie strap;

Fig. 3 is a view similar to Fig. 2, showing the manner of attachment of the lower end of the tie strap; and

Fig. 4 is a detail view in perspective of the upper end of the tie strap, and speed nut mounted thereon.

Like parts are indicated by similar characters of reference throughout the several views.

Referring to the drawings, a pump comprising a cylinder assembly in accordance with the instant invention may comprise an open ended cylinder 11, the opposite ends of which are closed by respective closure caps 12 and 13. The upper cap 12 has `an .axial opening mounting a push- 2,723,794 ce Patented Nov. 15, 1955 2; ing 14' inlwhich va rodllmSthas a sliding fit One-end'ofrthe rod '1S/is within the cylinder 11 and is connectedlto a p iston 'therein-(not shown); The other endi ofy the; rod/15 isoutside andl above the cylinder 11 and; has a handle 16 secured thereto. Itr willofI course be understoodtha-t the assembly comprising therod 1,5, handle 1^6 and1 piston (not shown)A are reciprocated in lthe'operati'on ofthe pump vto draw air into the cylinder and toy expel itathereffrom u nder pressure, the air leaving the cylinjder by way of an opening (n ot shown) vin the-'lower closure 'cap 13;

Referring to the cylinder assembly in greater detail'the *cylinder 11- isl in thev illustrated instancefmade of a relatively stiff but non-metallic material; for example liberboard. Phe closure caps 112t and 153g'` are stamped 'metal pieces, recessed to receive the respective ends of the cylinder 11 with a close t. Onthe upstandjng side wall of'closure cap 13` is a pair vof--diametrically opposed protrudingportions 1'7; cut away and formed' to present vertically offset ribs 18 and 19. Each portion 17 receives one endV of Ya thin relatively iiexible and' deformable metal strap 21, such end of the strap being folded about the rib 1% and substantially back upon itself with the extremity thereof` being -inserted `between the cylinder wall andthe rib-119. rlEhe straps 21 are accordingly anchored tothe closure., cap 13v against all ordinaryfthrusts and stresses.y

Tzhe straps 21z'extend upwardly along the outside of cylinder: 11 inn-close parallel relation thereto. The. upper ends, ther-,eef are-.received `in .protruding portions A22m the sidewall @tf1 the closure can andi insider/.heA @amare turned over into; abuttinaieiatieat with. the tap, @tithe cylinder 11 in a plane substantially normal to the axis of the cylinder and parallel to the base wall of cap 12. The inturned ends of the straps 21 project beyond the wall of cylinder 11 and are formed with respective openings 23.

Installed on the inturned end of each strap 21 is a speed nut 24. According to the known construction of devices of this kind, the nut 24 has an opening 25 in overlying registering relation with the opening 23 and outstruck resilient lingers 26 in underlying spaced relation to the opening 23. Extending through the registering openings 23 and 25 into threaded engagement with the fingers 26 is the shank of a screw 27 passed through the cap 12 and the head of which is seated in a countersunk opening 28 in the cap. By turning the screw 27 downward through the speed nut 24, the closure cap 12 is drawn firmly to a seat on cylinder 11, the reactant force of such action being applied in a direction to urge the strap 21 upward. The straps 21 thereby are tightened and the lower cap 13 is drawn to a firm seat on the bottom of cylinder 11.

From the above description it will be apparent that there is thus provided a device of the character described possessing the particular features of advantage before enumerated as desirable, but which obviously is susceptible of modification in its form, proportions, detail construction and arrangement of parts without departing from the principle involved or sacrificing any of its advantages.

While in order to comply with the statute the invention has been described in language more or less specific as to structural features, it is to be understood that the invention is not limited to the specific features shown, but that the means and construction herein disclosed comprise but one of several modes of putting the invention into effect.

Having thus described my invention, I claim:

1. A cylinder for a pump or the like, including a cylindrical member open at both ends, cap members receiving and enclosing the opposite ends of said cylindrical member, straps anchored at their one ends to the cap member at one end of said cylindrical member and extending in parallel relation to said cylindrical member toward the other end thereof, the others ends of said straps being received in and enclosed by the cap member at the said other end of said cylindrical member, said other end of said straps further being turned over upon the said other end of said cylindrical member, and detachable connections between the said cap member at said other end of the cylindrical member and said other ends of said straps.

2. A cylinder for use in a pump or the like, including an open ended cylindrical member, closure caps receiving and enclosing opposite ends of said cylinder, deformable tie members extending in parallel relation to said cylindrical member, means providing an anchor for one end of said tie members on one of said closure caps, the opposite ends of said tie members being received in and closed by the other one of said closure caps and further being turned over upon the opposite end of said cylindrical member and presenting respective screw openings, and screw connectors passed through the said other of said closure caps and through the screw openings in said tie members.

3. A cylinder according to claim 2, characterized by a nut installed on the turned over end of each of said tie members cooperable with a respective screw connector to tighten and hold said closure caps upon said cylindrical member.

4. A cylinder for use in a pump or the like, including an open ended cylindrical member, closure caps for the ends of said member, said caps being recessed to receive said cylinder with a relatively close tit, a plurality of relatively thin and deformable straps extending in parallel relation to said cylindrical member outside thereof, a rib formation on one of said closure caps to which the adjacent ends of said straps are detachably anchored,` the opposite ends of said straps being received within the other one of said closure caps and turned over the adjacent end of said cylindrical member to lie substantially normal to the axis of said member, and adjustable connections between said other closure cap and the turned over ends of said straps for tightening said straps to seat said closure caps rmly on the ends of said cylindrical member.

5. A cylinder for a pump or the like, including a cylindrical member made of relatively stiff and inflexible fiberboard material and open at its opposite ends, stamped metal closure caps having flanges respectively receiving and enclosing the opposite ends of said cylindrical member and tlexible deformable straps on the outer side of said cylindrical member engaged with and interconnecting said closure caps, said straps at their one end being positioned between the end of the wall of the cylindrical member and the overlying ange of said metal closure cap, the end of said strap being connected to the under side of said closure cap.

6. A cylinder according to claim 5, characterized in that said straps are detachably connected to said closure caps, the other of said caps presenting extruded rib portions over which ends of respective straps are folded back upon themselves.

References Cited in the tile of this patent UNITED STATES PATENTS 782,720 Brown Feb. 14, 1905 1,012,867 Lachman Dec. 26, 1911 1,138,120 Lachman May 4, 1915 1,429,220 Blanton Sept. 19, 1922 1,636,223 Freeman July 19, 1927 1,847,110 Holub Mar. 1, 1932 2,293,399 Moecker Aug. 18, 1942 2,434,377 l Watson Jan. 13, 1948 

